He was fine yesterday. Flaring at me, begging for food, being his usual corny self.

This morning he was listless and barely alive. Then I saw the problem. When I'd rinsed out the filter cartridge, it didn't seat properly when I put it back in. He's been in water leaching out waste for the last 2 days. I did a water change but it was too late.

I feel terrible. It didn't have to happen. I killed my buddy. He'd have been a father in a couple weeks. How could I have not seen that? I'll never find another one like him. He was beautiful and he had so much personality.